Support Node.js 0.10 (Revert #1059) (#1074)

fix #1073

Author: abetomo

CHANGELOG.md

@@ -1,3 +1,8 @@
+2.20.2 / 2019-10-11
+==================
+
+  * Support Node.js 0.10 (Revert #1059)
+
 2.20.1 / 2019-09-29
 ==================
 

index.js

@@ -99,7 +99,7 @@ Option.prototype.is = function(arg) {
 function Command(name) {
   this.commands = [];
   this.options = [];
-  this._execs = new Set();
+  this._execs = {};
   this._allowUnknownOption = false;
   this._args = [];
   this._name = name || '';
@@ -178,7 +178,7 @@ Command.prototype.command = function(name, desc, opts) {
   if (desc) {
     cmd.description(desc);
     this.executables = true;
-    this._execs.add(cmd._name);
+    this._execs[cmd._name] = true;
     if (opts.isDefault) this.defaultExecutable = cmd._name;
   }
   cmd._noHelp = !!opts.noHelp;
@@ -484,7 +484,7 @@ Command.prototype.parse = function(argv) {
     })[0];
   }
 
-  if (this._execs.has(name)) {
+  if (this._execs[name] === true) {
     return this.executeSubCommand(argv, args, parsed.unknown);
   } else if (aliasCommand) {
     // is alias of a subCommand

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "commander",
-  "version": "2.20.1",
+  "version": "2.20.2",
   "description": "the complete solution for node.js command-line programs",
   "keywords": [
     "commander",